S
M
T
W
T
F
S
29
36°
26°
30
27°
21°
31
24°
15°
1
33°
17°
2
34°
29°
3
41°
27°
4
50°
28°
5
50°
32°
6
37°
15°
7
56°
25°
8
33°
23°
9
47°
21°
10
57°
20°
11
67°
33°
12
56°
28°
13
41°
27°
14
60°
34°
15
61°
26°
16
28°
14°
17
23°
13°
18
39°
14°
19
52°
14°
20
63°
34°
21
80°
34°
22
75°
36°
23
51°
32°
24
33°
21°
25
31°
19°
26
40°
19°
27
41°
20°
28
52°
27°
29
50°
26°
30
57°
33°
1
67°
38°
2
59°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Neptune
Neptune's April 2026 forecast shows daily high temperatures ranging from 41° to 67°, with overnight lows between 20° and 38°. The average high for April is 54° with an average low of 29°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Neptune. See also: May | June | July.